. Railway mechanical engineer . - is that airentering the bunker over the top of the bulkhead becomeschilled, and in its downward motion creates a suction orsiphoning effect which draws air from the body of the carinto the bunker through the openings in the bulkhead. Al-though this system is on some cars of fairly recent originit is significant that many railroads or owners who used it h/ireNertinq. yzT&Q Lming-ICork Board-^/le Facing Fig. 5—Typical Cros *24 Go/v 5 feeV« r&G Unmq/z InsulationZ Facing V/6 T^G. Uning^ Vz Insulation 2 Layers, Paper 5 Sections of Bulkheads on their olde
. Railway mechanical engineer . - is that airentering the bunker over the top of the bulkhead becomeschilled, and in its downward motion creates a suction orsiphoning effect which draws air from the body of the carinto the bunker through the openings in the bulkhead. Al-though this system is on some cars of fairly recent originit is significant that many railroads or owners who used it h/ireNertinq. yzT&Q Lming-ICork Board-^/le Facing Fig. 5—Typical Cros *24 Go/v 5 feeV« r&G Unmq/z InsulationZ Facing V/6 T^G. Uning^ Vz Insulation 2 Layers, Paper 5 Sections of Bulkheads on their older cars have abandoned it in favor of the solidbulkhead. The pre%ailing trend of indicates a recog-nition of the value of solid and insulated bulkheads. Thegeneral trend .seems to Ijc to use two layers of A-m. hairfelt t>etween two walls of matchcd-and-dressed-wood lining. An interesting exception, and on a quite re-cent car, is the of one layer of l-in. cork bulkheads are constructed of two walls with a fewlayers of wateq)roof paper Ijetween them. Occasionally anair space is contained l>etwet-n the walls. In one instance,in addition to a dead-air space, two layers of J/4-in. hairfelt are provided. Some cross sections of bulkheads areshown in Fig. 5. Spnre lirlou- Bulkheads.—The space between the lioltomof the bulkhead and the c
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
